scholarly journals AVALIAÇÃO DA DISPONIBILIDADE HÍDRICA NA SUB-BACIA DO BOI BRANCO ATRAVÉS DO BALANÇO HÍDRICO CLIMATOLÓGICO E DE CULTIVO

Irriga ◽  
2017 ◽  
Vol 22 (1) ◽  
pp. 1-17
Author(s):  
Mariana Alexandre de Lima Sales ◽  
RODRIGO MÁXIMO SÁNCHEZ ROMÁN ◽  
LEONOR RODRÍGUEZ SINOBAS ◽  
RAIMUNDO NONATO FARIAS MONTEIRO ◽  
JOÃO VICTOR RIBEIRO DA SILVA DE SOUZA
Keyword(s):  
Water Balance ◽  
Water Deficit ◽  
Environmental Planning ◽  
Water Cycle ◽  
Crop Coefficient ◽  
Monthly Precipitation ◽  
Agricultural Planning ◽  
Historical Series ◽  
Average Monthly Precipitation ◽  
E Mail

AVALIAÇÃO DA DISPONIBILIDADE HÍDRICA NA SUB-BACIA DO BOI BRANCO ATRAVÉS DO BALANÇO HÍDRICO CLIMATOLÓGICO E DE CULTIVO  MARIANA ALEXANDRE DE LIMA SALES1; RODRIGO MÁXIMO SÁNCHEZ ROMÁN2; LEONOR RODRÍGUEZ SINOBAS3; RAIMUNDO NONATO FARIAS MONTEIRO4; JOÃO VICTOR RIBEIRO DA SILVA DE SOUZA5. 1 Tecnóloga em Irrigação e Drenagem, Doutoranda em Agronomia (Irrigação e Drenagem) – FCA/UNESP. Rua José Barbosa de Barros, 1780, CEP 18610-307, Botucatu – SP, e-mail: [email protected] Eng. de Irrigação e Drenagem, Prof. Doutor FCA/UNESP. Rua José Barbosa de Barros, 1780, CEP 18610-307, Botucatu, SP. Fone: (14) 3711-7100. E-mail: [email protected] Eng. Agrônoma, Profa. Doutora ETSIA/UPM, Ciudad Universitaria, 28040 Madri, Espanha. e-mail: [email protected] Tecnólogo em Recursos Hídricos/Irrigação, Doutor em Agronomia (Irrigação e Drenagem) – FCA/UNESP. Rua José Barbosa de Barros, 1780, CEP 18610-307, Botucatu – SP, e-mail: [email protected] Eng. Agrônomo, Doutorando em Agronomia (Irrigação e Drenagem) – FCA/UNESP. Rua José Barbosa de Barros, 1780, CEP 18610-307, Botucatu – SP, e-mail: [email protected].  1 RESUMO Uma das formas de contabilizar a quantidade de água de um determinado sistema é por meio do balanço hídrico, o qual é uma importante ferramenta para o processo de avaliação do ciclo da água em uma determinada região. O objetivo deste trabalho foi determinar o balanço hídrico na sub-bacia hidrográfica do Boi Branco-SP, para servir como ferramenta ao planejamento hidroagrícola e ambiental da região. Para o balanço hídrico climatológico, utilizaram-se dados da série histórica da região (1971 a 1995). Os dados de evapotranspiração foram estimados pelo método de Thornthwaite. O balanço hídrico climatológico mostrou déficit hídrico total anual de 10,1 mm, e um excedente de 319,7 mm, tendo no mês de janeiro um excedente de 92,6 mm, para a precipitação média mensal; com a precipitação efetiva mensal com probabilidade de 75%, déficit hídrico no solo é de 238,8 mm e o excedente 56,8 mm. Quando se adiciona a esses dados os das culturas implantadas na área de estudo, como coeficiente de cultivo e fator de depleção da umidade do solo, observa-se que todas as culturas do estudo apresentaram déficit hídrico em todos os meses em que estiveram no campo. Palavras-chave: Planejamento hidroagrícola, capacidade de água disponível no solo, evapotranspiração.  SALES, M. A. L.; SÁNCHEZ-ROMÁN, R. M.; SONOBAS, L. R.; MONTEIRO, R. N. F.; SOUZA, J. V. R. S.ASSESSMENT OF WATER AVAILABILITY AT BOI BRANCO WATERSHED   THROUGH CLIMATIC WATER BALANCE AND GROWING  2 ABSTRACT One way to calculate the amount of water in a determined system is by means of the water balance, an important tool for the assessment of the water cycle in a specific region. The main goal of this work was to establish the water balance in the watershed Boi Branco-SP, so that it can be used as a tool for the hydro-agricultural and environmental planning of the region. For the climatic water balance, data of the historical series of the region (1971 - 1995) were used. Evapotranspiration data were estimated by the Thornthwaite method. The climatic water balance showed  total annual water deficit  of 10.1 mm, and surplus of 319.7 mm, with January presenting surplus  of  92.6 in the average monthly precipitation; given that the effective monthly precipitation presenting probability of 75%,  water deficit  in the soil  is 238.8 mm and surplus is 56.8 mm. When these data are added to the ones of the crop, as a crop coefficient and soil humidity depletion factor, it is observed that all crops studied showed water deficit  in all the months covered. Keyword: Water agricultural planning, water capability available in the soil, evapotranspiration.

scholarly journals BALANÇO HÍDRICO E ESTIMATIVA DO CONSUMO RELATIVO DE ÁGUA DA CULTURA DA CANA-DE-AÇÚCAR NA REGIÃO NOROESTE PAULISTA

Irriga ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 94-101
Author(s):  
Regiane De Carvalho Bispo ◽  
Fernando Braz Tangerino Hernandez ◽  
Antônio Heriberto de Castro Teixeira
Keyword(s):  
Water Balance ◽  
Water Deficit ◽  
Water Consumption ◽  
Saccharum Officinarum ◽  
Soil Water Storage ◽  
Growth Stages ◽  
Critical Periods ◽  
Relative Water ◽  
E Mail ◽  
Phenological Phases

BALANÇO HÍDRICO E ESTIMATIVA DO CONSUMO RELATIVO DE ÁGUA DA CULTURA DA CANA-DE-AÇÚCAR NA REGIÃO NOROESTE PAULISTA¹     REGIANE DE CARVALHO BISPO2; FERNANDO BRAZ TANGERINO HERNANDEZ3 E ANTÔNIO HERIBERTO DE CASTRO TEIXEIRA4   [1] Apoio financeiro da FAPESP Processo 2.009/52.467-4. 2 Doutoranda do Programa de Pós-Graduação em Irrigação e Drenagem, Universidade Estadual Paulista “Júlio Mesquita Filho” - UNESP/FCA, Rua José Barbosa de Barros, 1780, Botucatu, SP. E-mail: [email protected] 3 Professor Titular, Departamento de Fitossanidade, Engenharia Rural e Solos, Universidade Estadual Paulista “Júlio Mesquita Filho”- UNESP, Ilha Solteira, SP. E-mail: [email protected] 4 Pesquisador, Embrapa Monitoramento por Satélite, Campinas, SP. E-mail: [email protected]     1 RESUMO   O presente trabalho teve como objetivo determinar o balanço hídrico e estimar o consumo relativo de água para a cultura da cana-de-açúcar nas diferentes fases fenológica, para o município de Sud Mennucci, visando fornecer informações úteis aos estudos de zoneamentos agroclimáticos e definição de época de menor risco para a produção dessa cultura. Os dados utilizados no estudo corresponderam ao período de 2012 a 2016, sendo calculados o balanço hídrico sequencial mensal e o balanço hídrico normal mensal, ambos utilizando a capacidade de armazenamento de água disponível no solo (CAD) de 60 mm. O Índice de Satisfação das Necessidades de Água para a cultura (ISNA), definido como a relação entre a evapotranspiração real e a evapotranspiração máxima (ETr/ETm) foi utilizado como critério na definição das fases fenológicas favorável para o cultivo. Os resultados obtidos indicam que, nas fases de perfilhamento e crescimento de colmos e nos meses entre julho e outubro são os períodos mais críticos com relação à deficiência hídrica, considerando a colheita realizada em maio, necessitando de reposição de água nestes períodos para evitar decréscimo da produtividade.   PALAVRAS-CHAVE: Evapotranspiração, deficiência hídrica, Saccharum officinarum.     BISPO, R. C.; HERNANDEZ, F. B. T; TEIXEIRA, A. H. C. WATER BALANCE AND RELATIVE WATER CONSUMPTION OF SUGARCANE IN THE NORTHWESTERN REGION OF SÃO PAULO     2 ABSTRACT   The present work aims to determine the water balance and estimate the relative water consumption for sugarcane crop in the different phenological phases, in the municipality of Sud Mennucci, attempting to provide useful information to the agroclimatic zoning studies and to define the time of a lesser risk to production of this crop. The data used in the study corresponded to the period from 2012 to 2016, and both the monthly sequential water balance and the regular monthly water balance were calculated using 60 mm as soil water storage capacity (WSC). The Water Satisfaction Index for Culture (WSIC), defined as the relation between actual evapotranspiration and maximum evapotranspiration (ETr/ETm), was used as a criterion in the definition of the phenological phases favorable for cultivation. The results indicate that the tillering and stalks growth stages, and the months between July and October are the most critical periods in relation to the water deficit, considering the harvest in May, there is the need of water replacement in these periods to prevent a decrease in productivity.   Keywords: evapotranspiration, water deficit, Saccharum officinarum.

scholarly journals BALANÇO HÍDRICO CLIMATOLÓGICO NORMAL E SEQUENCIAL DO MUNICÍPIO DE PEREIRA BARRETO - SP COMO AUXILIO PARA O PLANEJAMENTO DA AGRICULTURA IRRIGADA

Irriga ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 530-545
Author(s):  
Pedro Alcantara da Silva Abreu ◽  
Fernando Braz Tangerino Hernandez
Keyword(s):  
Water Balance ◽  
Water Deficit ◽  
Sao Paulo ◽  
Annual Precipitation ◽  
Irrigated Agriculture ◽  
São Paulo ◽  
Crop Failure ◽  
Tietê River ◽  
E Mail ◽  
Average Annual Precipitation

BALANÇO HÍDRICO CLIMATOLÓGICO NORMAL E SEQUENCIAL DO MUNICÍPIO DE PEREIRA BARRETO - SP COMO AUXILIO PARA O PLANEJAMENTO DA AGRICULTURA IRRIGADA     PEDRO ALCANTARA DA SILVA ABREU1 E FERNANDO BRAZ TANGERINO HERNANDEZ2   1 Doutorando em Agronomia: Irrigação e Drenagem, Departamento de Engenharia Rural, Universidade Estadual Paulista, Avenida Universitária, n° 3780, Altos do Paraíso, 18610-034, Botucatu, São Paulo, Brasil. E-mail; [email protected]. 2 Professor Titular, Departamento de Fitossanidade, Engenharia Rural e Solos - DEFERS, Universidade Estadual Paulista, Avenida Brasil Sul, n° 56, Centro, 15385-000, Ilha Solteira, São Paulo, Brasil. E-mail: [email protected]     1 RESUMO   Este trabalho teve como objetivo gerar um balanço hídrico climatológico (BHC) normal e sequencial para o município de Pereira Barreto, SP para identificar os períodos do ano com excedente e déficit de água no solo. Foram realizados dois BHCs para o município, determinados a partir do método de Thorthwaite e Mather (1955), com base nos dados das estações agrometereologicas automáticas Bonança e Santa Adélia, pertencentes à Rede Agrometeorológica do Noroeste Paulista, operada pela Unesp de Ilha Solteira. A precipitação média anual é de 1.214 mm e a evapotranspiração de 1.340 mm para a Estação Bonança, enquanto para a Santa Adélia, a precipitação média anual é de 1.204 mm e evapotranspiração de 1.574 mm. Com a Capacidade de Água Disponível (CAD) de 40 mm, os BHCs constataram sete meses de déficit hídrico no solo, entre março e outubro na Estação Bonança, localizada às margens do rio Tietê e de abril a novembro na Estação Santa Adélia, localizada na porção noroeste do município. O excesso de água no solo na Estação Bonança aconteceu entre os meses de novembro e fevereiro e na Santa Adélia entre janeiro e março. O BHC mostrou ser grande o risco de frustação de safra com culturas anuais no município sem a utilização de irrigação.   Palavras-chave: evapotranspiração, déficit hídrico, irrigação, agrometeorologia, Noroeste Paulista.     ABREU, P. A. S.; HERNANDEZ, F. B. T. NORMAL AND SEQUENTIAL CLIMATOLOGICAL WATER BALANCE IN THE MUNICIPALITY OF PEREIRA BARRETO - SP AS AID FOR THE PLANNING OF IRRIGATED AGRICULTURE     2 ABSTRACT   This work aimed to generate a normal and sequential climatological water balance (BHC) for the municipality of Pereira Barreto, SP to identify the periods of the year with surplus and deficit of water in the soil. Two BHCs were carried out for the municipality determined by the method of Thorthwaite and Mather (1955), based on data from the automatic agro-meteorological stations Bonança and Santa Adélia, belonging to the Northwest Agro-meteorological Network of the Northwest, operated by Unesp of Ilha Solteira. The average annual precipitation is 1214 mm and the evapotranspiration is 1340 mm for the Bonança Station, while for the Santa Adélia Station, the average annual precipitation is 1204 mm and evapotranspiration is 1574 mm. With the available Water Storage (CAD) of 40 mm, the BHCs found seven months of water deficit in the soil, between March and October in the Bonança Station, located on the banks of the Tietê River and from April to November in the Santa Adélia Station, located in the northwest portion of the municipality. Excess water in the soil in the Bonança Station occurred between the months of November and February and in the Santa Adélia Station, between January and March. BHC showed a high risk of crop failure with annual crops in the municipality without the use of irrigation.   Keywords: evapotranspiration, water deficit, irrigation, agrometeorology, Northwest Paulista.

scholarly journals ESTIMATIVA DA EVAPOTRANSPIRAÇÃO E DO COEFICIENTE DE CULTURA DO CAFEEIRO (Coffea arabica L.)

Irriga ◽  
2003 ◽  
Vol 8 (3) ◽  
pp. 273-282 ◽  
Author(s):  
Polyanna Mara de Oliveira ◽  
Antonio Marciano da Silva ◽  
Pedro Castro Neto
Keyword(s):  
Water Balance ◽  
Coffea Arabica ◽  
Reference Evapotranspiration ◽  
Crop Coefficient ◽  
Crop Field ◽  
Coffee Plants ◽  
Climate Station ◽  
Evapotranspiration Estimation ◽  
E Mail ◽  
Coffea Arabica L

ESTIMATIVA DA EVAPOTRANSPIRAÇÃO E DO COEFICIENTE DE CULTURA DO CAFEEIRO (Coffea arabica L.)   Polyanna Mara de OliveiraAntônio Marciano da SilvaPedro Castro NetoDepartamento de Engenharia, Universidade Federal de Lavras, Lavras, MG, CP 37, CEP 37200-000. Fone: (35) 3829 1362. E-mail: [email protected]   1 RESUMO  Em experimento com a cultura de cafeeiro Catuaí (Coffea arabica L.) irrigado por gotejamento, no período de junho a setembro, na Fazenda Muquém-FAEPE/UFLA, Lavras, MG, estimou-se a sua evapotranspiração e o seu coeficiente de cultura, com base em um balanço hídrico. A área experimental constituiu-se de duas unidades: a primeira, representativa da referida lavoura com dezesseis anos de idade e a segunda, três anos após o processo de recepa. Assim, foram instalados tensiômetros nas duas unidades nas profundidades de 0,10; 0,30 e 0,50 m. Três vezes por semana foram feitas leituras por meio de tensímetro digital e mensalmente retiradas amostras de solo para determinação da umidade pelo método padrão de estufa. Os dados climatológicos necessários à estimativa da evapotranspiração de referência e aos cálculos da irrigação foram obtidos junto à Estação Climatológica Principal de Lavras, MG, situada na Universidade Federal de Lavras. O cafeeiro com dezesseis anos de cultivo apresentou uma evapotranspiração no período analisado, variando de 2,52 a 3,50 mm dia-1, com média de 2,91 mm dia-1 e um coeficiente de cultura variando de 0,72 a 1,50, com média de 0,96. O cafeeiro recepado apresentou uma evapotranspiração no período analisado, variando de 1,55 a 2,01 mm dia-1 com média de 1,72 mm dia-1 e coeficiente de cultura variando de 0,44 a 0,87, com média de 0,57.  UNITERMOS: cafeeiro arabica, evapotranspiração, coeficiente de cultura, balanço hídrico.  OLIVEIRA, P. M.; SILVA, A. M. da; CASTRO NETO, P. ESTIMATE OF COFFEE CROP (Coffea arabica L.) COEFFICIENT AND EVAPOTRANSPIRATION   2 ABSTRACT  Crop coefficient and evapotranspiration were determined in Catuaí coffee (Coffea arabic L.) using the water balance method in a drip irrigated experiment at Muquém-FAEPE/UFLA farm, Lavras, MG, Brasil, from June to September. The experimental area comprised two units: the first one, a 16 year-old crop field and the second one, 3 year-old plants in the same crop field after a pruning process. Tensiometers were installed at 0.10, 0.30 and 0.50 m depth in both units. Readings through digital tensimeter were done three times a week and soil samples taken monthly in order to determine the over-dry moisture by the standard method. Climatologic data for reference evapotranspiration estimation and irrigation calculation were obtained at the main Climate Station in the Federal University of Lavras. The sixteen year-old coffee plants presented 2.91 mm day-1 average evapotranspiration, varying from 2.52 to 3.50 mm day-1 and 0.96 average crop coefficient, varying from 0.72 to 1.50. The pruned coffee plants presented 1,72 mm day-1 average evapotranspiration,  varying from 1.55 to 2.01 and 0.57 average crop coefficient, varying from 0.44 to 0.87.  KEYWORDS: arabic coffee, evapotranspiration, crop coefficient, water balance 

scholarly journals Aptidão agroclimática para o cultivo da mandioca no município de Barbalha - CE

2019 ◽  
Vol 12 (5) ◽  
pp. 1815
Author(s):  
Rigoberto Moreira de Matos ◽  
Patrícia Ferreira da Silva ◽  
Antônio Soares Barros ◽  
José Dantas Neto ◽  
Raimundo Mainar de Medeiros ◽  
...  
Keyword(s):  
Water Balance ◽  
Air Temperature ◽  
Manihot Esculenta ◽  
Potential Evapotranspiration ◽  
Meteorological Data ◽  
Moisture Index ◽  
Agricultural Planning ◽  
Historical Series ◽  
Agricultural Potential ◽  
Cassava Crop

O conhecimento da aptidão agroclimática é uma ferramenta importante na determinação do potencial agrícola de uma dada região, visando auxiliar no planejamento agrícola para obtenção de maior retorno econômico. Assim, objetivou-se com este estudo determinar a aptidão agroclimática para o cultivo da mandioca (Manihot esculenta Cranz) visando disponibilizar informações para a implantação desta cultura no município de Barbalha - CE. Determinou-se o balanço hídrico climatológico e o índice de umidade utilizado uma série histórica de 45 anos de dados meteorológicos, referente ao período de 1973 a 2017 de precipitação pluviométrica e temperatura média do ar. Para determinar a aptidão agroclimática para o cultivo da mandioca foi utilizada as faixas do índice de umidade. As variáveis climáticas médias anuais foram: temperatura do ar (25,6 ºC), precipitação pluviométrica (1050,2 mm), evapotranspiração potencial (1482,8 mm), evapotranspiração real (813,7 mm), deficiência hídrica (669,1 mm) e excesso hídrico (236,5 mm). O município de Barbalha - CE possui aptidão agroclimática plena em 100% do território para o cultivo da mandioca, com necessidade de irrigação complementar no período em que apresenta deficiência de água no solo. As características agroclimáticas do município de Barbalha - CE favorecem o crescimento e produtividade da mandioca. Os resultados deste estudo para o município de Barbalha - CE, proporcionam subsídios para a implantação da cultura da mandioca mediante a disponibilização das informações do balanço hídrico e da aptidão agroclimática para a região.  Agroclimatic aptitude for the cultivation of cassava in the municipality of Barbalha - CEA B S T R A C TThe knowledge of agroclimatic aptitude is an important tool in determining the agricultural potential of a given region, aiming to assist in agricultural planning to obtain a higher economic return. Thus, the objective of this study was to determine the agroclimatic aptitude for the cultivation of manioc (Manihot esculenta Cranz) in order to provide information for the implantation of this crop in the municipality of Barbalha - CE. It was determined the climatic water balance and the humidity index used a historical series of 45 years of meteorological data, referring to the period from 1973 to 2017 of rainfall and average air temperature. To determine the agroclimatic aptitude for cassava cultivation, the moisture index bands were used. The mean annual climatic variables were: air temperature (25.6 ºC), rainfall (1050.2 mm), potential evapotranspiration (1482.8 mm), real evapotranspiration (813.7 mm), water deficit (669.1 mm) and water excess (236.5 mm). The municipality of Barbalha - CE has full agroclimatic aptitude in 100% of the territory for the cultivation of cassava, with the need for complementary irrigation in the period when it presents deficiency of water in the soil. The agroclimatic characteristics of the municipality of Barbalha - CE favor the growth and productivity of cassava. The results of this study for the municipality of Barbalha - CE, provide subsidies for the implantation of the cassava crop through the availability of information on water balance and agroclimatic aptitude for the region.Keywords: Manihot esculenta Cranz, moisture content, water conditions, agricultural potential.

scholarly journals Biomass Burning and Water Balance Dynamics in the Lake Chad Basin in Africa

Earth ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 340-356
Author(s):  
Forrest W. Black ◽  
Jejung Lee ◽  
Charles M. Ichoku ◽  
Luke Ellison ◽  
Charles K. Gatebe ◽  
...  
Keyword(s):  
Water Balance ◽  
Biomass Burning ◽  
Water Cycle ◽  
Potential Evapotranspiration ◽  
Southern Oscillation ◽  
Wet Season ◽  
Lake Chad ◽  
Chad Basin ◽  
Lake Chad Basin ◽  
Logone Catchment

The present study investigated the effect of biomass burning on the water cycle using a case study of the Chari–Logone Catchment of the Lake Chad Basin (LCB). The Chari–Logone catchment was selected because it supplies over 90% of the water input to the lake, which is the largest basin in central Africa. Two water balance simulations, one considering burning and one without, were compared from the years 2003 to 2011. For a more comprehensive assessment of the effects of burning, albedo change, which has been shown to have a significant impact on a number of environmental factors, was used as a model input for calculating potential evapotranspiration (ET). Analysis of the burning scenario showed that burning grassland, which comprises almost 75% of the total Chari–Logone land cover, causes increased ET and runoff during the dry season (November–March). Recent studies have demonstrated that there is an increasing trend in the LCB of converting shrubland, grassland, and wetlands to cropland. This change from grassland to cropland has the potential to decrease the amount of water available to water bodies during the winter. All vegetative classes in a burning scenario showed a decrease in ET during the wet season. Although a decrease in annual precipitation in global circulation processes such as the El Niño Southern Oscillation would cause droughts and induce wildfires in the Sahel, the present study shows that a decrease in ET by the human-induced burning would cause a severe decrease in precipitation as well.

scholarly journals Estimating surface runoff and groundwater recharge in an urban catchment using a water balance approach

2021 ◽  
Vol 29 (7) ◽  
pp. 2411-2428
Author(s):  
Robin K. Weatherl ◽  
Maria J. Henao Salgado ◽  
Maximilian Ramgraber ◽  
Christian Moeck ◽  
Mario Schirmer
Keyword(s):  
Soil Moisture ◽  
Water Balance ◽  
Groundwater Recharge ◽  
Surface Runoff ◽  
Urban Areas ◽  
Water Cycle ◽  
Land Use Changes ◽  
Curve Number ◽  
Hydrograph Separation ◽  
Balance Approach

AbstractLand-use changes often have significant impact on the water cycle, including changing groundwater/surface-water interactions, modifying groundwater recharge zones, and increasing risk of contamination. Surface runoff in particular is significantly impacted by land cover. As surface runoff can act as a carrier for contaminants found at the surface, it is important to characterize runoff dynamics in anthropogenic environments. In this study, the relationship between surface runoff and groundwater recharge in urban areas is explored using a top-down water balance approach. Two empirical models were used to estimate runoff: (1) an updated, advanced method based on curve number, followed by (2) bivariate hydrograph separation. Modifications were added to each method in an attempt to better capture continuous soil-moisture processes and explicitly account for runoff from impervious surfaces. Differences between the resulting runoff estimates shed light on the complexity of the rainfall–runoff relationship, and highlight the importance of understanding soil-moisture dynamics and their control on hydro(geo)logical responses. These results were then used as input in a water balance to calculate groundwater recharge. Two approaches were used to assess the accuracy of these groundwater balance estimates: (1) comparison to calculations of groundwater recharge using the calibrated conceptual HBV Light model, and (2) comparison to groundwater recharge estimates from physically similar catchments in Switzerland that are found in the literature. In all cases, recharge is estimated at approximately 40–45% of annual precipitation. These conditions were found to closely echo those results from Swiss catchments of similar characteristics.

scholarly journals Time Series Analysis of Climatic Variables in Peninsular Spain. Trends and Forecasting Models for Data between 20th and 21st Centuries

Climate ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 119
Author(s):  
Pitshu Mulomba Mukadi ◽  
Concepción González-García
Keyword(s):  
Time Series ◽  
Temperature Series ◽  
Climatic Variables ◽  
Monthly Precipitation ◽  
Agricultural Crops ◽  
Arima Models ◽  
Cover Time ◽  
Pests And Diseases ◽  
Historical Series ◽  
Preliminary Phase

Time series of mean monthly temperature and total monthly precipitation are two of the climatic variables most easily obtained from weather station records. There are many studies analyzing historical series of these variables, particularly in the Spanish territory. In this study, the series of these two variables in 47 stations of the provincial capitals of mainland Spain were analyzed. The series cover time periods from the 1940s to 2013; the studies reviewed in mainland Spain go up to 2008. ARIMA models were used to represent their variation. In the preliminary phase of description and identification of the model, a study to detect possible trends in the series was carried out in an isolated manner. Significant trends were found in 15 of the temperature series, and there were trends in precipitation in only five of them. The results obtained for the trends are discussed with reference to those of other, more detailed studies in the different regions, confirming whether the same trend was maintained over time. With the ARIMA models obtained, 12-month predictions were made by measuring errors with the observed data. More than 50% of the series of both were modeled. Predictions with these models could be useful in different aspects of seasonal job planning, such as wildfires, pests and diseases, and agricultural crops.

scholarly journals Large-scale water balance indicators for different pruning dates of tropical wine grape

2016 ◽  
Vol 51 (7) ◽  
pp. 849-857 ◽  
Author(s):  
Antônio Heriberto de Castro Teixeira ◽  
Jorge Tonietto ◽  
Janice Freitas Leivas
Keyword(s):  
Water Balance ◽  
Large Scale ◽  
Scale Up ◽  
Crop Coefficient ◽  
Thermal Conditions ◽  
Wine Grape ◽  
Wine Quality ◽  
Growing Seasons ◽  
More Care ◽  
Brazilian Northeast

Abstract: The objective of this work was to develop and apply water balance indicators to be scaled up in the wine grape (Vitis vinifera) growing regions of the municipalities of Petrolina and Juazeiro, in the states of Pernambuco and Bahia, respectively, Brazil, simulating different pruning dates along the year. Previous energy balance measurements were used to relate the crop coefficient (Kc) with the accumulated degree-days (DDac). This model was applied to scale up the water balance indicators during the growing seasons. When irrigation water was available, the best pruning periods were from May to July, due to the better natural thermal and hidrological conditions. More care should be taken for pruning done in other periods of the year, regarding the effect of increasing thermal conditions of wine quality. The water balance indicators, both successfully developed and applied, allow large-scale analyses of the thermohydrological conditions for wine grape production under the semiarid conditions of the Brazilian Northeast.

scholarly journals Drought resistance of sugar-cane crop for different levels of water availability in the soil

2014 ◽  
Vol 34 (2) ◽  
pp. 203-210 ◽  
Author(s):  
Fernando da S. Barbosa ◽  
Rubens D. Coelho ◽  
Rafael Maschio ◽  
Carlos J. G. de S. Lima ◽  
Everaldo M. da Silva
Keyword(s):  
Water Balance ◽  
Soil Water ◽  
Water Deficit ◽  
Early Development ◽  
Drought Resistance ◽  
Sugar Cane ◽  
Water Availability ◽  
Sandy Loam ◽  
Final Population ◽  
Different Levels

Soil water availability is the main cause of reduced productivity, and the early development period most sensitive to water deficit. This study aimed to evaluate the drought resistance of the varieties of sugar-cane RB867515 and SP81-3250 during the early development using different levels of water deficit on four soil depths. The experiment was conducted at the Department of Biosystems at Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP) in a greenhouse in soil classified as Oxisol, sandy loam texture (Series "Sertãozinho"). Once exhausted the level of available water in the soil, the dry strength of the studied strains are relatively low. Water balance with values less than -13 mm cause a significant decrease in the final population of plants, regardless of the variety, and values below -35 mm, leads to the death of all plants.

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